Linear effects of increasing weaning age in three-site production
نویسندگان
چکیده
منابع مشابه
Effects of weaning age on growing-pig costs and revenue in a multi-site production system
Materials and methods: In Trial One (2272 pigs), litters were weaned at 12, 15, 18, and 21 days of age. In Trial Two (3456 pigs), litters were weaned at 15, 16, 18, 19, 21, and 22 days of age and categorized into three treatments (15.5, 18.5, and 21.5 days of age). In Trial Two, pigs in each age group were fed one of two nursery feeding programs. Each trial was conducted as a randomized complet...
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TJF: SF Services, PO Box 5489, Little Rock, Arkansas, 72119; RCT, KH-D: W234 Veterinary Medicine, University of Missouri, Columbia, Missouri, 65211 eports concerning the effects of weaning age on pig performance in the nursery and the ability to eliminate pathogens conflict. Wiseman, et al., suggested that the ability to successfully eradicate pathogens increases as weaning age declines.1 Clark...
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Materials and methods: This study was conducted as a randomized complete block design. Treatments were weaning at 12, 15, 18, and 21 days of age (N = 2272 pigs). Each block was an off-site nursery, with four replicates (pens) of each treatment in each of four blocks. All pigs in a block were weaned from a 7300-head sow farm on the same day (Day 0). Each pen was observed for 15 minutes on Days 7...
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The present study was performed to study the effect of inbreeding on the pre-weaning growth traits including the birth weight (BW), weaning weight (WW), average daily gain (ADG), Kleiber ratio (KR) and lamb survival from birth to weaning (SUR) in Baluchi, Iran-Black and Zandi sheep. Significant positive inbreeding trends were found only for Baluchi and Iran-Black breeds as 0.038 and 0.278, resp...
متن کاملthe effects of high non fibrous carbohydrates diet on milk production, inflammation and molecular mechanism of innate immunity in lactating dairy cows
پژوهش حاضر با هدف بررسی اثر جیره حاوی کربوهیدراتهای غیرالیافی زیاد و بروز التهاب در گاوهای شیرده در دو آزمایش جداگانه انجام شد. در آزمایش اول 20 رأس گاو مبتلا به ورم پستان از دو گروه کم تولید و پرتولید (هر کدام 10 رأس) و 20 رأس گاو سالم از دو گروه کم تولید و پرتولید (هر کدام 10 رأس) انتخاب شدند. همه گاوها در دوره دوم و یا سوم شیردهی و در روزهای 80-120 پس از زایش بودند. میانگین تولید شیر در گروه...
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ژورنال
عنوان ژورنال: Kansas Agricultural Experiment Station Research Reports
سال: 2002
ISSN: 2378-5977
DOI: 10.4148/2378-5977.6774